A 34-year-old Stamford, Conn. woman driving a black Infiniti with a young child inside tried to ram through a White House barricade Thursday afternoon, and then led police on a chase toward the Capitol, where police shot and killed her.

There are new details on what led up to the hours-long tense standoff between the Baltimore police force and one of their own 20-year veterans. Now that officer is accused of murdering his girlfriend, the mother of his four-year-old son.